310 Miss Cora B. Sanders on the Rhopalocera 



their high intrinsic interest and because of the irreparable 

 injury which their loss or destruction would inflict upon this 

 historic collection. In order to render this and the following 

 papers of greater permanent value, and to bring them into 

 relation with such a publication whenever it may be issued, 

 I propose to reproduce any of Burchell's reference numbers 

 which are still to be found attached to the specimens. The 

 vast majority of these are, however, distinguished by their 

 dates, and have no such numbers. The following example 

 will serve clearly to distinguish between Barchell's reference 

 numbers and those which are now added to bring the speci- 

 mens into relation with these papers : — 



Bz. 907. 1II.+ 25. 10. 25. 2 ? = 37, 38. 



Burchell's reference number will be printed be/ore the date 

 of capture and in italics, while the numbers now added will 

 always appear after the date and printed in heavy type. 

 J3z, indicates that the date or number immediately following 

 is an original label, written in Brazil. ///. refers to the 

 number of individuals recorded in Burchell's note-book as far 

 as the number 1022. In this case two are accounted for by 

 specimens 37 and 38, while the third is to be found upon 40 

 under an allied species. The + indicates that the specimens 

 also bear labels which were carefully written and added after 

 Burchell's return to England. Examples are seen in the 

 labels to the right of tigs. 9 and 10 on PI. VI., where the 

 Brazilian number is lowest. When Bz. is wanting, Burchell 

 had copied the reference number and removed the original, as 

 in the label accompanying fig. 11. Bz. without the + is 

 used when the specimen bears only a Brazilian label (as in 

 fig. 6). In all such cases as this the dates have been recovered 

 irom the Brazilian note-book. All the other figures on 

 Plate VI. are without Brazilian labels, and bear dates, some- 

 times accompanied by notes (figs. 5 and 8), carefully written 

 after the return home ; and this is true of the great majority of 

 the specimens hereafter recorded, all, indeed, of wliich the 

 dates are not preceded by italicized letters or numbers. lu 

 many cases the original Brazilian date was never copied and 

 remains as the only label. Such dates are preceded by Bz. 



1 trust that these directions will enable the reader to 

 ascertain at a glance exactly what records of the great natu- 

 ralist accompany or refer to each specimen in the collection to 

 which he devoted so large a part of his life. 



E. B. POULTON. 



Oxford, Jan. 25, 1904. 



